Exhibit 99.4

Rio Tinto plc
5 Aldermanbury Square
London EC2V 7HR
United Kingdom
T +44 (0) 20 7781 2000
F +44 (0) 20 7781 1800

Press release

Rio Tinto completes sale of Greens Creek Mine interest

16 April 2008

Rio Tinto has completed the sale of Kennecott Greens Creek Mining Company and Kennecott Juneau Mining Company, the subsidiaries holding its 70.3 per cent interest in the Greens Creek mine in Alaska to an affiliate of Hecla Mining Company, giving Hecla 100 per cent ownership.

The sale price includes cash consideration of US$700 million and $50 million in Hecla stock. The transaction, which was announced on 12 February 2008, is part of Rio Tinto’s planned programme to divest at least US$15 billion of assets. Rio Tinto also recently completed the sale of its interest in the Cortez gold mine in Nevada for $1.695 billion in cash along with certain retained contingent royalty interests. With the completion of both transactions, Rio Tinto has achieved close to one quarter of its target of realising asset sales of US$10 billion in 2008.

In November 2007, Rio Tinto announced the results of its overall strategic review of the company’s asset portfolio following its acquisition of Alcan. Options are also being explored to divest Rio Tinto Energy America (coal), Rio Tinto Minerals’ talc and borates businesses, Rio Tinto Alcan Packaging, Rio Tinto Alcan Engineered Products, Rio Tinto’s Northparkes copper mine in Australia and Rio Tinto’s Sweetwater (USA) and Kintyre (Australia) uranium assets.

About Rio Tinto

Rio Tinto is a leading international mining group headquartered in the UK, combining Rio Tinto plc, a London and NYSE listed company, and Rio Tinto Limited, which is listed on the Australian Securities Exchange.

Rio Tinto’s business is finding, mining, and processing mineral resources. Major products are aluminium, copper, diamonds, energy (coal and uranium), gold, industrial minerals (borax, titanium dioxide, salt, talc) and iron ore. Activities span the world but are strongly represented in Australia and North America with significant businesses in South America, Asia, Europe and southern Africa.

Forward-Looking Statements

This announcement includes “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. All statements other than statements of historical facts included in this announcement, including, without limitation, those regarding Rio Tinto’s financial position, business strategy, plans and objectives of management for future operations (including development plans and objectives relating to Rio Tinto’s

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products, production forecasts and reserve and resource positions), are forward-looking statements. Such forward-looking statements involve known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of Rio Tinto, or industry results, to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements.

Such forward-looking statements are based on numerous assumptions regarding Rio Tinto’s present and future business strategies and the environment in which Rio Tinto will operate in the future. Among the important factors that could cause Rio Tinto’s actual results, performance or achievements to differ materially from those in the forward-looking statements include, among others, levels of actual production during any period, levels of demand and market prices, the ability to produce and transport products profitably, the impact of foreign currency exchange rates on market prices and operating costs, operational problems, political uncertainty and economic conditions in relevant areas of the world, the actions of competitors, activities by governmental authorities such as changes in taxation or regulation and such other risk factors identified in Rio Tinto’s most recent Annual Report on Form 20-F filed with the SEC or Form 6-Ks furnished to the SEC. Forward-looking statements should, therefore, be construed in light of such risk factors and undue reliance should not be placed on forward-looking statements. These forward-looking statements speak only as of the date of this announcement. Rio Tinto expressly disclaims any obligation or undertaking (except as required by applicable law, the City Code on Takeovers and Mergers (the “Takeover Code”), the UK Listing Rules, the Disclosure and Transparency Rules of the Financial Services Authority and the Listing Rules of the Australian Securities Exchange) to release publicly any updates or revisions to any forward-looking statement contained herein to reflect any change in Rio Tinto’s expectations with regard thereto or any change in events, conditions or circumstances on which any such statement is based.

Nothing in this announcement should be interpreted to mean that future earnings per share of Rio Tinto plc or Rio Tinto Limited will necessarily match or exceed its historical published earnings per share.

Subject to the requirements of the Takeover Code, none of Rio Tinto, any of its officers or any person named in this announcement with their consent or any person involved in the preparation of this announcement makes any representation or warranty (either express or implied) or gives any assurance that the implied values, anticipated results, performance or achievements expressed or implied in forward-looking statements contained in this announcement will be achieved.

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For further information, please contact:

Media Relations, London	Media Relations, Australia
Christina Mills	Ian Head
Office: +44 (0) 20 7781 1154	Office: +61 (0) 3 9283 3620
Mobile: +44 (0) 7825 275 605	Mobile: +61 (0) 408 360 101
Nick Cobban	Amanda Buckley
Office: +44 (0) 20 7781 1138	Office: +61 (0) 3 9283 3627
Mobile: +44 (0) 7920 041 003	Mobile: +61 (0) 419 801 349
Media Relations, US
Nancy Ives
Mobile: +1 619 540 3751
Investor Relations, London	Investor Relations, Australia
Nigel Jones	Dave Skinner
Office: +44 (0) 20 7781 2049	Office: +61 (0) 3 9283 3628
Mobile: +44 (0) 7917 227 365	Mobile: +61 (0) 408 335 309
David Ovington	Simon Ellinor
Office: +44 (0) 20 7781 2051	Office:+ 61 (0) 7 3867 1607
Mobile: +44 (0) 7920 010 978	Mobile: +61 (0) 439 102 811
Investor Relations, North America
Jason Combes
Office: +1 (0) 801 685 4535
Mobile: +1 (0) 801 558 2645
Email: questions@riotinto.com
Website: www.riotinto.com
High resolution photographs available at: www.newscast.co.uk